Pyrrolo[2,1-f][1,2,4]triazine-6-carboxylic acid, 1,4-dihydro-5-methyl-4-oxo-, ethyl ester
Ethyl 1,4-dihydro-5-methyl-4-oxopyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
5-Methyl-4-oxo-3,4-dihydropyrrolo[2,1-f][1,2,4]triazine-6-carboxylic acid ethyl ester